Modeling of hydrogen-air detonations in the TONUS CFD code and its application to the FLAME F-19 test

Eveliina Takasuo

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

2 Citations (Scopus)

Abstract

In severe accident management, the ability to predict pressure and thermal loads resulting from hydrogen combustion is important since they may threaten containment integrity. In computational modeling, different combustion regimes have to be accounted for and state-of-the-art techniques developed for reliable analysis. In the present study, the focus is on computational fluid dynamics code validation for reactive flows in the detonation regime. The FLAME hydrogen combustion test F-19 performed at the Sandia National Laboratories has been simulated by using the gas detonation model implemented in the TONUS CFD code which is developed by CEA and IRSN (France). In this model the reactive Euler equations are solved and the reaction rate is obtained by the Arrhenius global rate equation. Several simulations were run in order to examine the effect of modifying the parameters of the chemistry model. A mesh convergence study was performed for the purpose of finding out the necessary mesh resolution which could capture the detonation propagation with adequate accuracy. In addition, Chapman-Jouguet post-shock equilibrium conditions and the ZND detonation structure for the present gas mixture were examined by chemical kinetics calculations. The CFD simulation results were compared to the test results and the Chapman-Jouguet post-shock conditions. It was observed that the computational results differ from the C-J results with the CJ velocity being slightly exceeded. The model parameter study showed that it is not possible to significantly affect the flame propagation by adjusting the model parameters.
Original languageEnglish
Title of host publicationProceedings of the 16th International Conference on Nuclear Engineering, ICONE16 2008
Place of PublicationOrlando, USA
PublisherAmerican Society of Mechanical Engineers ASME
Pages717-725
ISBN (Print)978-0-7918-3820-4
Publication statusPublished - 2008
MoE publication typeA4 Article in a conference publication
Event16th International Conference on Nuclear Engineering, ICONE-16 - Orlando, Florida, United States
Duration: 11 May 200815 May 2008

Conference

Conference16th International Conference on Nuclear Engineering, ICONE-16
Abbreviated titleICONE16
CountryUnited States
CityOrlando, Florida
Period11/05/0815/05/08

Fingerprint

Detonation
Computational fluid dynamics
Hydrogen
Air
Euler equations
Thermal load
Reaction kinetics
Gas mixtures
Reaction rates
Accidents
Gases

Keywords

  • hydrogen
  • combustion
  • Arrhenius model
  • FLAME test facility
  • TONUS

Cite this

Takasuo, E. (2008). Modeling of hydrogen-air detonations in the TONUS CFD code and its application to the FLAME F-19 test. In Proceedings of the 16th International Conference on Nuclear Engineering, ICONE16 2008 (pp. 717-725). Orlando, USA: American Society of Mechanical Engineers ASME.
Takasuo, Eveliina. / Modeling of hydrogen-air detonations in the TONUS CFD code and its application to the FLAME F-19 test. Proceedings of the 16th International Conference on Nuclear Engineering, ICONE16 2008. Orlando, USA : American Society of Mechanical Engineers ASME, 2008. pp. 717-725
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abstract = "In severe accident management, the ability to predict pressure and thermal loads resulting from hydrogen combustion is important since they may threaten containment integrity. In computational modeling, different combustion regimes have to be accounted for and state-of-the-art techniques developed for reliable analysis. In the present study, the focus is on computational fluid dynamics code validation for reactive flows in the detonation regime. The FLAME hydrogen combustion test F-19 performed at the Sandia National Laboratories has been simulated by using the gas detonation model implemented in the TONUS CFD code which is developed by CEA and IRSN (France). In this model the reactive Euler equations are solved and the reaction rate is obtained by the Arrhenius global rate equation. Several simulations were run in order to examine the effect of modifying the parameters of the chemistry model. A mesh convergence study was performed for the purpose of finding out the necessary mesh resolution which could capture the detonation propagation with adequate accuracy. In addition, Chapman-Jouguet post-shock equilibrium conditions and the ZND detonation structure for the present gas mixture were examined by chemical kinetics calculations. The CFD simulation results were compared to the test results and the Chapman-Jouguet post-shock conditions. It was observed that the computational results differ from the C-J results with the CJ velocity being slightly exceeded. The model parameter study showed that it is not possible to significantly affect the flame propagation by adjusting the model parameters.",
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Takasuo, E 2008, Modeling of hydrogen-air detonations in the TONUS CFD code and its application to the FLAME F-19 test. in Proceedings of the 16th International Conference on Nuclear Engineering, ICONE16 2008. American Society of Mechanical Engineers ASME, Orlando, USA, pp. 717-725, 16th International Conference on Nuclear Engineering, ICONE-16, Orlando, Florida, United States, 11/05/08.

Modeling of hydrogen-air detonations in the TONUS CFD code and its application to the FLAME F-19 test. / Takasuo, Eveliina.

Proceedings of the 16th International Conference on Nuclear Engineering, ICONE16 2008. Orlando, USA : American Society of Mechanical Engineers ASME, 2008. p. 717-725.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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Y1 - 2008

N2 - In severe accident management, the ability to predict pressure and thermal loads resulting from hydrogen combustion is important since they may threaten containment integrity. In computational modeling, different combustion regimes have to be accounted for and state-of-the-art techniques developed for reliable analysis. In the present study, the focus is on computational fluid dynamics code validation for reactive flows in the detonation regime. The FLAME hydrogen combustion test F-19 performed at the Sandia National Laboratories has been simulated by using the gas detonation model implemented in the TONUS CFD code which is developed by CEA and IRSN (France). In this model the reactive Euler equations are solved and the reaction rate is obtained by the Arrhenius global rate equation. Several simulations were run in order to examine the effect of modifying the parameters of the chemistry model. A mesh convergence study was performed for the purpose of finding out the necessary mesh resolution which could capture the detonation propagation with adequate accuracy. In addition, Chapman-Jouguet post-shock equilibrium conditions and the ZND detonation structure for the present gas mixture were examined by chemical kinetics calculations. The CFD simulation results were compared to the test results and the Chapman-Jouguet post-shock conditions. It was observed that the computational results differ from the C-J results with the CJ velocity being slightly exceeded. The model parameter study showed that it is not possible to significantly affect the flame propagation by adjusting the model parameters.

AB - In severe accident management, the ability to predict pressure and thermal loads resulting from hydrogen combustion is important since they may threaten containment integrity. In computational modeling, different combustion regimes have to be accounted for and state-of-the-art techniques developed for reliable analysis. In the present study, the focus is on computational fluid dynamics code validation for reactive flows in the detonation regime. The FLAME hydrogen combustion test F-19 performed at the Sandia National Laboratories has been simulated by using the gas detonation model implemented in the TONUS CFD code which is developed by CEA and IRSN (France). In this model the reactive Euler equations are solved and the reaction rate is obtained by the Arrhenius global rate equation. Several simulations were run in order to examine the effect of modifying the parameters of the chemistry model. A mesh convergence study was performed for the purpose of finding out the necessary mesh resolution which could capture the detonation propagation with adequate accuracy. In addition, Chapman-Jouguet post-shock equilibrium conditions and the ZND detonation structure for the present gas mixture were examined by chemical kinetics calculations. The CFD simulation results were compared to the test results and the Chapman-Jouguet post-shock conditions. It was observed that the computational results differ from the C-J results with the CJ velocity being slightly exceeded. The model parameter study showed that it is not possible to significantly affect the flame propagation by adjusting the model parameters.

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BT - Proceedings of the 16th International Conference on Nuclear Engineering, ICONE16 2008

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Takasuo E. Modeling of hydrogen-air detonations in the TONUS CFD code and its application to the FLAME F-19 test. In Proceedings of the 16th International Conference on Nuclear Engineering, ICONE16 2008. Orlando, USA: American Society of Mechanical Engineers ASME. 2008. p. 717-725